net/smc: replace sock_put worker by socket refcounting
Proper socket refcounting makes the sock_put worker obsolete.
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/smc/smc_close.c b/net/smc/smc_close.c
index babe05d..4339852 100644
--- a/net/smc/smc_close.c
+++ b/net/smc/smc_close.c
@@ -110,6 +110,7 @@ static void smc_close_active_abort(struct smc_sock *smc)
release_sock(sk);
cancel_delayed_work_sync(&smc->conn.tx_work);
lock_sock(sk);
+ sock_put(sk); /* passive closing */
break;
case SMC_APPCLOSEWAIT1:
case SMC_APPCLOSEWAIT2:
@@ -125,11 +126,13 @@ static void smc_close_active_abort(struct smc_sock *smc)
case SMC_PEERCLOSEWAIT1:
case SMC_PEERCLOSEWAIT2:
if (!txflags->peer_conn_closed) {
+ /* just SHUTDOWN_SEND done */
sk->sk_state = SMC_PEERABORTWAIT;
sock_release(smc->clcsock);
} else {
sk->sk_state = SMC_CLOSED;
}
+ sock_put(sk); /* passive closing */
break;
case SMC_PROCESSABORT:
case SMC_APPFINCLOSEWAIT:
@@ -138,6 +141,8 @@ static void smc_close_active_abort(struct smc_sock *smc)
sk->sk_state = SMC_CLOSED;
break;
case SMC_PEERFINCLOSEWAIT:
+ sock_put(sk); /* passive closing */
+ break;
case SMC_PEERABORTWAIT:
case SMC_CLOSED:
break;
@@ -229,12 +234,14 @@ int smc_close_active(struct smc_sock *smc)
rc = smc_close_final(conn);
if (rc)
break;
- if (smc_cdc_rxed_any_close(conn))
+ if (smc_cdc_rxed_any_close(conn)) {
/* peer has closed the socket already */
sk->sk_state = SMC_CLOSED;
- else
+ sock_put(sk); /* postponed passive closing */
+ } else {
/* peer has just issued a shutdown write */
sk->sk_state = SMC_PEERFINCLOSEWAIT;
+ }
break;
case SMC_PEERCLOSEWAIT1:
case SMC_PEERCLOSEWAIT2:
@@ -272,27 +279,33 @@ static void smc_close_passive_abort_received(struct smc_sock *smc)
struct sock *sk = &smc->sk;
switch (sk->sk_state) {
+ case SMC_INIT:
case SMC_ACTIVE:
- case SMC_APPFINCLOSEWAIT:
case SMC_APPCLOSEWAIT1:
- case SMC_APPCLOSEWAIT2:
+ sk->sk_state = SMC_PROCESSABORT;
+ sock_put(sk); /* passive closing */
+ break;
+ case SMC_APPFINCLOSEWAIT:
sk->sk_state = SMC_PROCESSABORT;
break;
case SMC_PEERCLOSEWAIT1:
case SMC_PEERCLOSEWAIT2:
if (txflags->peer_done_writing &&
- !smc_close_sent_any_close(&smc->conn)) {
+ !smc_close_sent_any_close(&smc->conn))
/* just shutdown, but not yet closed locally */
sk->sk_state = SMC_PROCESSABORT;
- } else {
+ else
sk->sk_state = SMC_CLOSED;
- }
+ sock_put(sk); /* passive closing */
break;
+ case SMC_APPCLOSEWAIT2:
case SMC_PEERFINCLOSEWAIT:
+ sk->sk_state = SMC_CLOSED;
+ sock_put(sk); /* passive closing */
+ break;
case SMC_PEERABORTWAIT:
sk->sk_state = SMC_CLOSED;
break;
- case SMC_INIT:
case SMC_PROCESSABORT:
/* nothing to do, add tracing in future patch */
break;
@@ -336,13 +349,18 @@ static void smc_close_passive_work(struct work_struct *work)
case SMC_INIT:
if (atomic_read(&conn->bytes_to_rcv) ||
(rxflags->peer_done_writing &&
- !smc_cdc_rxed_any_close(conn)))
+ !smc_cdc_rxed_any_close(conn))) {
sk->sk_state = SMC_APPCLOSEWAIT1;
- else
+ } else {
sk->sk_state = SMC_CLOSED;
+ sock_put(sk); /* passive closing */
+ }
break;
case SMC_ACTIVE:
sk->sk_state = SMC_APPCLOSEWAIT1;
+ /* postpone sock_put() for passive closing to cover
+ * received SEND_SHUTDOWN as well
+ */
break;
case SMC_PEERCLOSEWAIT1:
if (rxflags->peer_done_writing)
@@ -360,13 +378,20 @@ static void smc_close_passive_work(struct work_struct *work)
/* just shutdown, but not yet closed locally */
sk->sk_state = SMC_APPFINCLOSEWAIT;
}
+ sock_put(sk); /* passive closing */
break;
case SMC_PEERFINCLOSEWAIT:
- if (smc_cdc_rxed_any_close(conn))
+ if (smc_cdc_rxed_any_close(conn)) {
sk->sk_state = SMC_CLOSED;
+ sock_put(sk); /* passive closing */
+ }
break;
case SMC_APPCLOSEWAIT1:
case SMC_APPCLOSEWAIT2:
+ /* postpone sock_put() for passive closing to cover
+ * received SEND_SHUTDOWN as well
+ */
+ break;
case SMC_APPFINCLOSEWAIT:
case SMC_PEERABORTWAIT:
case SMC_PROCESSABORT:
@@ -382,23 +407,11 @@ static void smc_close_passive_work(struct work_struct *work)
if (old_state != sk->sk_state) {
sk->sk_state_change(sk);
if ((sk->sk_state == SMC_CLOSED) &&
- (sock_flag(sk, SOCK_DEAD) || !sk->sk_socket)) {
+ (sock_flag(sk, SOCK_DEAD) || !sk->sk_socket))
smc_conn_free(conn);
- schedule_delayed_work(&smc->sock_put_work,
- SMC_CLOSE_SOCK_PUT_DELAY);
- }
}
release_sock(sk);
-}
-
-void smc_close_sock_put_work(struct work_struct *work)
-{
- struct smc_sock *smc = container_of(to_delayed_work(work),
- struct smc_sock,
- sock_put_work);
-
- smc->sk.sk_prot->unhash(&smc->sk);
- sock_put(&smc->sk);
+ sock_put(sk); /* sock_hold done by schedulers of close_work */
}
int smc_close_shutdown_write(struct smc_sock *smc)
